Non-consumable electrode can be applied in gas tungsten arc welding (GTAW), or tungsten inert-gas (TIG) welding. GTAW or TIG welding is a manual welding process that uses a non-consumable electrode made of tungsten, an inert or semi-inert gas mixture, and a separate filler material. Especially useful for welding thin materials, this method is characterized by a stable arc and high quality welds, but it requires significant operator skill and can only be accomplished at relatively low speeds. It can be…

Barium tungsten electrode may be manufactured via powder injection molding (PIM) process with homogeneous microstructure and good electron emission performance, which has been successfully applied in high power xenon flash lamps and pump lamps for laser. Compared with conventional tungsten electrode wound with tungsten wire, barium tungsten electrode for high pressure gas discharge lamps is produced using PIM process to form electrode with complex shapes, allowing designers to design electrode shape in accordance with the ding of electrode. PIM is…

Tungsten electrode holder is also called tungsten needle holder, tungsten rod clip or tungsten clip, which is applied to clamp electrode to avoid falling during welding. Generally speaking, the electrode holder is used in a jacket, flow guide or copper head. Tungsten electrode holder is divided into two parts, clamp and jacket, both of which are made of tungsten. They can be applied in combination. Also, clamp can be used alone. The specification of tungsten electrode holder should be matched…

Ternary composite tungsten electrode should be studied to know its lamination mechanism during sintering. A tertiary RE-W electrode with a diameter of 16mm was used to do the research. The morphologies and phases of the sintered billets were investigated by SEM and XRD, respectively. The composition of the second phase particles was analyzed by EDAX. The percentages of rare earth oxides in different regions were detected by ICEP-AES. The distribution of RE elements at the fracture was detected by EPMA.…

Composite tungsten electrode is produced to meet more stringent requirements on tungsten electrode materials in welding industry – higher reliability and stability. In general, the arcing characteristics of composite tungsten electrode are better than that of tungsten electrode. And among composite tungsten electrode, ternary composite tungsten electrode has better performance than binary composite tungsten electrode. The optimal rare earth oxide ratio of ternary composite tungsten electrode is La2O3: CeO2: Y2O3=1:1:3. The performance of several tungsten electrodes mixed with rare earth…